Three-phase cable clamp with backflow clamp

Abstract

The utility model discloses a three -phase cable hoop with backflow wire fixture, include: cable line hoop, it includes hoop seat and with hoop cover of hoop seat matching, the recess of adjacent is equipped with in the hoop seat, the inverted V shape groove is equipped with in the hoop cover, and the outside circumference of hoop cover is equipped with slide rail, backflow wire fixture, including the slide block of slidable installation on slide rail, the limit rod of fixedly established on the slide block and with limit rod connects backflow wire clamp, through setting slide rail, slide block, limit rod, will backflow wire clamp and cable line hoop parallel fixed together, realize cable line and backflow line fixed while, still can realize the position and distance limitation of two, not only has improved the installation effect, and still satisfies two norm distance, and the practicality is stronger.

Description

Technical Field

[0001] This utility model relates to a three-phase cable clamp with a return line clamp, belonging to the technical field of three-phase cable and return line installation. Background Technology

[0002] For single-core cable lines with direct grounding at a single point, during a power frequency short circuit, first calculate whether the sheath induced voltage requirement is met, assuming the entire circuit is grounded. If the power frequency induced voltage generated by the cable's metallic sheath during a system short circuit exceeds the cable sheath insulation withstand strength or the power frequency withstand voltage of the sheath voltage limiter, or if it is necessary to suppress the electrical interference intensity of nearby weak current lines, a return line with lower impedance should be laid parallel to the cable line. The return line generally has an insulation layer. The impedance of the return line and the grounding resistance at both ends should be sufficient to suppress the power frequency induced overvoltage of the cable's metallic sheath, and its cross-section should meet the thermal steady-state requirements under the action of the maximum transient current. The arrangement of the return line should minimize the losses generated on the return line during normal cable operation. When any terminal of the cable line is in a power plant or substation, the return line should be connected to the grounding grid for the power, source, and neutral lines. When a single-circuit cable is arranged in a triangular pattern, the return line should preferably be arranged from left to right, with two equidistant transpositions; however, this is not practically feasible, so it is arranged on the left and right sides of the triangular pattern with one equidistant transposition. However, in current projects, the installation of cables and return lines mainly adopts the method of fixed installation. Due to differences in laying environment and construction technology, the distance between return lines and cables is often not effectively guaranteed, which poses certain safety risks. Utility Model Content

[0003] Based on the above, this utility model provides a three-phase cable clamp with a return line clamp to overcome the shortcomings of the prior art.

[0004] The technical solution of this utility model is: a three-phase cable clamp with a return line clamp, comprising:

[0005] A cable clamp includes a clamp seat and a clamp cover that matches the clamp seat. The clamp seat has adjacent grooves, the clamp cover has an inverted V-shaped groove, and the outer circumferential side of the clamp cover has a slide rail.

[0006] The return line clamp includes a sliding block that can be slidably mounted on a slide rail, a limiting rod fixed on the sliding block, and a return line clamp connected to the limiting rod.

[0007] In one example, the slide rail is an arc-shaped shell arranged circumferentially on the outer side of the clamp cover, with an arc-shaped groove along the direction of the arc-shaped shell, and a strip-shaped opening on the outer side of the arc-shaped shell; wherein, the sliding block is installed in the arc-shaped groove, and one end of the limiting rod passes through the strip-shaped opening and is connected to the sliding block.

[0008] In one example, the limiting rod further includes a first locking nut and a second locking nut disposed on the threaded rod, the first locking nut being sleeved between the threaded sleeve and the arc-shaped shell, and the second locking nut being sleeved outside the threaded sleeve.

[0009] In one example, the threaded sleeve includes a frame and a fixing nut disposed at the bottom of the frame; wherein the fixing nut is sleeved on the threaded rod, and the return clamp is fixed to the top of the frame.

[0010] In one example, the return clamp includes two first half clamps and fasteners that close and secure the two first half clamps.

[0011] The beneficial effects of this utility model are as follows: by setting the slide rail, sliding block, and limiting rod, the return line clamp and the cable clamp are fixed together side by side. While fixing the cable and the return line, the position and distance between the two can also be limited. This not only improves the installation effect, but also meets the standard distance between the two, making it highly practical. Attached Figure Description

[0012] Figure 1 A schematic diagram of a three-phase cable clamp with a return line clamp;

[0013] Figure 2 This is a schematic diagram of a cable clamp;

[0014] Figure 3 This is a schematic diagram of the clamp cover and slide rail;

[0015] Figure 4 This is a schematic diagram of the return line fixture;

[0016] Figure 5 A 3D installation diagram;

[0017] Figure 6 Install the main view;

[0018] Explanation of reference numerals in the attached figures:

[0019] Cable clamps: 11 clamp seat, 111 groove, 12 clamp cover, 121 inverted V-groove, 13 slide rail, 131 arc shell, 132 arc groove, 133 strip opening;

[0020] Return line clamp: 21 sliding block, 22 limiting rod, 221 threaded rod, 222 threaded sleeve, 223 first locking nut, 224 second locking nut, 2221 frame, 2222 fixing nut, 23 return line clamp, 231 first half clamp, 232 fastener. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] Please see Figures 1 to 6 This embodiment provides a three-phase cable clamp with a return line clamp, comprising a cable clamp and a return line clamp.

[0023] The cable clamp includes a clamp base 11 and a clamp cover 12 that matches the clamp base 11. The clamp base 11 has adjacent grooves 111 on both sides, and the clamp cover 12 has an inverted V-shaped groove 121. Three-phase cables can be placed into the grooves 111 and the V-shaped groove, and then the clamp cover 12 is fixed to the clamp base 11 using fasteners 232. A slide rail 13 is circumferentially fixed to the outer side of the clamp cover 12. The return cable clamp includes a sliding block 21 slidably mounted on the slide rail 13, a limiting rod 22 fixed on the sliding block 21, and a return cable clamp 23 connected to the limiting rod 22.

[0024] By using the slide rail 13, sliding block 21, and limiting rod 22, the return line clamp 23 and the cable clamp are fixed together side by side. This not only fixes the cable and return line, but also limits their position and distance. This not only improves the installation effect, but also meets the standard distance between them, making it highly practical.

[0025] For ease of operation, the slide rail 13 is an arc-shaped shell 131 fixed to the outer circumference of the clamp cover 12. An arc-shaped groove 132 is provided along the direction of the arc-shaped shell 131, and a strip-shaped opening 133 is provided on the outer side of the arc-shaped shell 131. The sliding block 21 is installed in the arc-shaped groove 132 and can move along the arc-shaped groove 132. One end of the limiting rod 22 passes through the strip-shaped opening 133 and is connected to the sliding block 21. Thus, the position of the return line clamp 23 can be adjusted by changing the position of the sliding block 21 in the arc-shaped groove 132.

[0026] For easy adjustment, the limiting rod 22 includes a threaded rod 221 and a threaded sleeve 222. One end of the threaded rod 221 is connected to the sliding block 21, and the threaded sleeve 222 is fitted onto the other end of the threaded rod 221. The outer end of the threaded sleeve 222 is connected to the return line clamp 23. By rotating the threaded sleeve 222 to adjust its position on the threaded rod 221, the overall length of the limiting rod 22 can be adjusted.

[0027] For easy fixing, the limiting rod 22 also includes a first locking nut 223 and a second locking nut 224 sleeved on the threaded rod 221. The first locking nut 223 is sleeved between the threaded sleeve 222 and the arc-shaped shell 131 to fix the limiting rod 22 on the arc-shaped shell 131. The second locking nut 224 is sleeved outside the threaded sleeve 222 to prevent the threaded sleeve 222 from detaching from the threaded rod 221.

[0028] For ease of operation, the threaded sleeve 222 includes a frame 2221 and a fixing nut 2222 installed at the bottom of the frame 2221. The fixing nut 2222 is sleeved on the threaded rod 221, and the return wire clamp 23 is fixed to the top of the frame 2221. The fixing nut 2222 on the threaded rod 221 can be adjusted by turning the frame 2221.

[0029] For ease of installation, the return clamp 23 includes two first half clamps 231 and fasteners 232 that close and fix the two first half clamps 231. The fasteners 232 can be bolts and nuts.

[0030] The working principle of the three-phase cable clamp with return line clamp is as follows: First, install two phase cables in the two grooves 111 of the clamp seat 11, then place the third phase cable in the V-groove, and fix the clamp cover 12 to the clamp seat 11 with fasteners 232; then, place the sliding block 21 on the slide rail 13 and move it to the predetermined position, while adjusting the length of the limit rod 22; finally, install the return line in the return line clamp 23.

[0031] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A three-phase cable clamp with a return line clamp, characterized in that, include: The cable clamp includes a clamp seat (11) and a clamp cover (12) that matches the clamp seat (11). The clamp seat (11) has adjacent grooves (111) and the clamp cover (12) has an inverted V-shaped groove (121). The clamp cover (12) has a slide rail (13) on its outer circumferential side. The return line clamp includes a sliding block (21) slidably mounted on a slide rail (13), a limiting rod (22) fixed on the sliding block (21), and a return line clamp (23) connected to the limiting rod (22). The return line clamp (23) includes two first half clamps (231) and a fastener (232) for closing and fixing the two first half clamps (231). The slide rail (13) is an arc-shaped shell (131) located on the outer circumferential side of the clamp cover (12), with an arc-shaped groove (132) along the direction of the arc-shaped shell (131) and a strip-shaped opening (133) on the outer side of the arc-shaped shell (131). The sliding block (21) is installed in the arc groove (132), and one end of the limiting rod (22) passes through the strip opening (133) and is connected to the sliding block (21). The limiting rod (22) includes a threaded rod (221) and a threaded sleeve (222); One end of the threaded rod (221) is connected to the sliding block (21), the threaded sleeve (222) is sleeved on the other end of the threaded rod (221), and the end of the threaded sleeve (222) is connected to the return line clamp (23). The limiting rod (22) further includes a first locking nut (223) and a second locking nut (224) disposed on the threaded rod (221). The first locking nut (223) is sleeved between the threaded sleeve (222) and the arc-shaped shell (131), and the second locking nut (224) is sleeved outside the threaded sleeve (222). The threaded sleeve (222) includes a frame (2221) and a fixing nut (2222) disposed at the bottom of the frame (2221). The fixing nut (2222) is sleeved on the threaded rod (221), and the return wire clamp (23) is fixed to the top of the frame (2221).

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